EP1849581A1 - Magnetic induction welding device - Google Patents

Magnetic induction welding device Download PDF

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Publication number
EP1849581A1
EP1849581A1 EP20060113015 EP06113015A EP1849581A1 EP 1849581 A1 EP1849581 A1 EP 1849581A1 EP 20060113015 EP20060113015 EP 20060113015 EP 06113015 A EP06113015 A EP 06113015A EP 1849581 A1 EP1849581 A1 EP 1849581A1
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EP
European Patent Office
Prior art keywords
housing
neck
inductive
welding
magnetic induction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20060113015
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German (de)
French (fr)
Inventor
John Caron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisapack Holding SA
Original Assignee
Aisapack Holding SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisapack Holding SA filed Critical Aisapack Holding SA
Priority to EP20060113015 priority Critical patent/EP1849581A1/en
Publication of EP1849581A1 publication Critical patent/EP1849581A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the element with high magnetic permeability has a significant advantage over an element whose function would simply have aimed at blocking the magnetic field. This prevents a local heating of the element occurs, which would have resulted in the maintenance of the disadvantages that we seek precisely to eliminate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The device for welding plastic elements by magnetic induction (1), comprises inductive unit and welding zone (2) for fixing molded plastic piece (3) having neck on the circumference end of tubular body made up of metal layer and thermoplastic layer of resin. The device comprises housing (7) adapted to the neck. The inductive unit is disposed to the welding zone and housing. The housing has element with high magnetic permeability (8) constituting the entire internal wall of the housing. The inductive unit has machined inductive element having an opening.

Description

Domaine de l'inventionField of the invention

La présente invention se situe dans le domaine du soudage d'éléments plastiques par induction. Elle concerne plus particulièrement le soudage d'une pièce plastique moulée sur le pourtour de l'extrémité d'un corps tubulaire constitué d'au moins une couche métallique et d'au moins une couche de résine thermoplastiqueThe present invention is in the field of welding of plastic elements by induction. It relates more particularly to the welding of a molded plastic part around the end of a tubular body consisting of at least one metal layer and at least one layer of thermoplastic resin

Etat de la techniqueState of the art

Un dispositif de soudage tel que décrit dans le chapitre précédent est divulgué dans le brevet US 4 454 402 .A welding device as described in the previous chapter is disclosed in the patent US 4,454,402 .

Dans ce type de dispositif, les boucles de champ magnétique générées par la bobine ne sont que partiellement canalisées. II en résulte que certaines lignes de champ magnétique traversent le corps tubulaire et la pièce plastique en des endroits qui ne correspondent pas à la zone de soudage. Le chauffage de ces régions incontrôlées peut engendrer des défauts, comme par exemple une déformation locale du matériau d'emballage en dehors de la zone à souder. Ce problème est d'autant plus accentué lorsque l'extrémité libre du goulot est obturée par un opercule métallique, à savoir par un élément favorisant la création de courants induits.In this type of device, the magnetic field loops generated by the coil are only partially channeled. As a result, certain magnetic field lines pass through the tubular body and the plastic part at locations that do not correspond to the welding zone. Heating these uncontrolled regions can cause defects, such as local deformation of the packaging material outside the area to be welded. This problem is all the more accentuated when the free end of the neck is closed by a metal seal, namely by an element promoting the creation of induced currents.

II existe donc un besoin de remédier aux problèmes précités, en particulier lorsque le goulot est obturé par un opercule métallique.There is therefore a need to remedy the aforementioned problems, especially when the neck is closed by a metal seal.

Exposé général de l'inventionGeneral presentation of the invention

Dans l'invention, la solution du problème précité consiste à munir le dispositif de soudage d'un élément à grande perméabilité magnétique, à savoir un élément qui canalise les lignes de champ magnétique dans l'environnement de l'extrémité libre du goulot.In the invention, the solution of the problem mentioned above is to provide the welding device with a high magnetic permeability element, namely an element that channels the magnetic field lines in the environment of the free end of the neck.

L'objet de l'invention concerne donc un dispositif de soudage par induction magnétique comprenant des moyens inductifs et une zone de soudage pour la fixation d'une pièce plastique moulée sur le pourtour de l'extrémité d'un corps tubulaire constitué d'au moins une couche métallique et d'au moins une couche de résine thermoplastique; la pièce plastique moulée comporte un goulot; le dispositif comprend en outre un logement adapté pour contenir ledit goulot; les moyens inductifs étant disposés à proximité de la zone de soudage et du logement, c'est à dire à des distances suffisamment proches pour ressentir le champ magnétique qui est généré par lesdits moyens inductifs. Le dispositif selon l'invention se caractérise par le fait que le logement comprend un élément à grande perméabilité magnétique.The object of the invention therefore relates to a magnetic induction welding device comprising inductive means and a welding zone for fixing a molded plastic part around the end of a tubular body consisting of at least one metal layer and at least one layer of thermoplastic resin; the molded plastic part has a neck; the device further comprises a housing adapted to contain said neck; the inductive means being disposed near the welding zone and the housing, that is to say at distances close enough to feel the magnetic field that is generated by said inductive means. The device according to the invention is characterized in that the housing comprises an element with high magnetic permeability.

Grâce à la présence de l'élément à grande perméabilité magnétique, on diminue considérablement le nombre des lignes de champs qui traversent le goulot. Lorsque ce dernier est muni d'un opercule métallique, le risque de chauffage à cet endroit est donc fortement réduit, voir éliminé.Thanks to the presence of the element with high magnetic permeability, the number of field lines that cross the neck is considerably reduced. When the latter is equipped with a metal seal, the risk of heating at this location is greatly reduced or eliminated.

A noter également que l'élément à grande perméabilité magnétique présente un avantage important par rapport à un élément dont la fonction aurait simplement visé à bloquer le champ magnétique. On évite en effet qu'un échauffement local de l'élément se produise, ce qui aurait eu pour conséquence le maintien des inconvénients que l'on cherche précisément à éliminer.It should also be noted that the element with high magnetic permeability has a significant advantage over an element whose function would simply have aimed at blocking the magnetic field. This prevents a local heating of the element occurs, which would have resulted in the maintenance of the disadvantages that we seek precisely to eliminate.

Selon un mode de réalisation de l'invention, l'élément à grande perméabilité magnétique constitue l'intégralité de la paroi interne du logement.According to one embodiment of the invention, the element with high magnetic permeability constitutes the entirety of the inner wall of the housing.

De préférence, le logement est constitué par l'orifice d'un élément inductif usiné qui forme une spire des moyens inductifs.Preferably, the housing is constituted by the orifice of a machined inductive element which forms a turn of the inductive means.

Exposé détaillé de l'inventionDetailed exposition of the invention

L'invention est décrite plus en détail ci-après au moyen d'un exemple illustré par les figures suivantes :

  • La figure 1 présente une coupe schématique d'un dispositif de soudage selon l'invention.
  • La figure 2 présente une vue en perspective du dispositif de la figure 1.
The invention is described in more detail below by means of an example illustrated by the following figures:
  • Figure 1 shows a schematic section of a welding device according to the invention.
  • FIG. 2 presents a perspective view of the device of FIG. 1.

Le dispositif de soudage 1 comprend un enroulement 10 fixé sur un élément inductif usiné 6, ce dernier comportant un orifice 7 qui loge l'extrémité libre du goulot 5 d'une tête de tube 3.
Le dispositif comprend en outre une zone soudage 2 qui correspond à l'endroit ou se superposent la périphérie de la tête de tube 3 et l'extrémité d'un corps tubulaire 4 constitué d'au moins une couche métallique et d'au moins une couche de résine thermoplastique.
Le goulot 5 est obturé par un opercule métallique 9.
L'enroulement 10 et l'élément inductif 6 forme une bobine d'induction, l'élément inductif 6 formant la spire la plus proche de la zone de soudage 2.
Afin de réduire, voir éliminer, le passage de lignes du champ magnétique à travers l'opercule métallique 9, l'orifice 7 comporte sur son pourtour intérieur un élément annulaire 8 constitué d'un matériau tel que ferrite qui canalise les lignes de champ magnétique.
La présence de l'élément annulaire 8 évite que des lignes de champs magnétique traversent l'opercule métallique 9, faute de quoi ce dernier serait chauffé et générerait des déformations comme indiqué précédemment. Il importe également de relever que l'élément annulaire 8 doit pouvoir être traversé par les lignes de champs magnétique et non pas les bloquer. Si tel était le cas, il chaufferait, ce qui irait précisément à l'encontre de l'objectif recherché.
La présence de l'élément annulaire 8 est d'autant plus avantageuse étant donné la proximité entre la zone de chauffage pour le soudage 2 et la zone à ne pas chauffer, à savoir celle où se trouve l'opercule métallique 9.
On notera enfin que la présence de l'élément annulaire 8 permet de mieux focaliser l'énergie de chauffage au niveau de la zone de soudage 2, ce qui constitue un gain de courant nécessaire au bon fonctionnement du dispositif de chauffage.The welding device 1 comprises a winding 10 fixed on a machined inductive element 6, the latter comprising an orifice 7 which houses the free end of the neck 5 of a tube head 3.
The device further comprises a welding zone 2 which corresponds to the place where the periphery of the tube head 3 and the end of a tubular body 4 consisting of at least one metal layer and of at least one thermoplastic resin layer.
The neck 5 is closed by a metal cap 9.
The winding 10 and the inductive element 6 form an induction coil, the inductive element 6 forming the coil closest to the welding zone 2.
In order to reduce or eliminate the passage of lines of the magnetic field through the metal cap 9, the orifice 7 has on its inner periphery an annular element 8 made of a material such as ferrite which channels the magnetic field lines. .
The presence of the annular element 8 prevents lines of magnetic fields passing through the metal cap 9, otherwise the latter would be heated and generate deformations as indicated above. It is also important to note that the annular element 8 must be able to be traversed by the magnetic field lines and not block them. If this were the case, it would heat up, which would be precisely counter to the desired objective.
The presence of the annular element 8 is all the more advantageous given the proximity between the heating zone for the welding 2 and the zone not to heat, namely that where the metal seal 9 is located .
Finally, it will be noted that the presence of the annular element 8 makes it possible to better focus the heating energy at the welding zone 2, which constitutes a gain of current necessary for the proper functioning of the heating device.

Claims (3)

Dispositif de soudage par induction magnétique (1) comprenant des moyens inductifs (6,10) et une zone de soudage (2) pour la fixation d'une pièce plastique moulée (3) sur le pourtour de l'extrémité d'un corps tubulaire (4) constitué d'au moins une couche métallique et d'au moins une couche de résine thermoplastique; la pièce plastique moulée (3) comportant un goulot (5); le dispositif (1) comprenant en outre un logement (7) adapté pour contenir ledit goulot (5); les moyens inductifs (6,10) étant disposés à proximité de la zone de soudage (2) et du logement (7); caractérisé par le fait que le logement (7) comprend un élément à grande perméabilité magnétique (8).Magnetic induction welding device (1) comprising inductive means (6, 10) and a welding zone (2) for fixing a molded plastic part (3) on the periphery of the end of a tubular body (4) consisting of at least one metal layer and at least one thermoplastic resin layer; the molded plastic part (3) having a neck (5); the device (1) further comprising a housing (7) adapted to contain said neck (5); the inductive means (6, 10) being disposed near the welding zone (2) and the housing (7); characterized in that the housing (7) comprises a high magnetic permeability element (8). Dispositif selon la revendication 1 caractérisé par le fait que l'élément à grande perméabilité magnétique (8) constitue l'intégralité de la paroi interne du logement (7).Device according to claim 1 characterized in that the element with high magnetic permeability (8) constitutes the entirety of the inner wall of the housing (7). Dispositif selon la revendication 1 ou 2 caractérisé par le fait que les moyens inductifs (6,10) comprennent un élément inductif usiné (6) qui comporte un orifice, ce dernier constituant ledit logement (7).Device according to claim 1 or 2 characterized in that the inductive means (6,10) comprise a machined inductive element (6) which comprises an orifice, the latter constituting said housing (7).
EP20060113015 2006-04-24 2006-04-24 Magnetic induction welding device Withdrawn EP1849581A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20060113015 EP1849581A1 (en) 2006-04-24 2006-04-24 Magnetic induction welding device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3083733A1 (en) 2018-07-16 2020-01-17 Arkema France Method of induction welding of parts based on thermoplastic material
FR3083734A1 (en) 2018-07-16 2020-01-17 Arkema France METHOD FOR INDUCTION WELDING OF PARTS BASED ON THERMOPLASTIC MATERIAL
FR3083732A1 (en) 2018-07-16 2020-01-17 Arkema France Method for welding parts based on thermoplastic material
WO2020016514A1 (en) 2018-07-16 2020-01-23 Arkema France Method for welding parts made of thermoplastic material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548140A (en) * 1967-07-25 1970-12-15 Continental Can Co Method and apparatus for sealing containers using heat activated magnetic sealing compound
JPS57148619A (en) * 1981-03-09 1982-09-14 Honshu Paper Co Ltd Method and apparatus for bonding of container or the like by high frequency induction heating
EP0842854A2 (en) * 1996-11-15 1998-05-20 Auto-Mate Technologies, LLC Induction sealing apparatus for sealing a foil cap to a container opening

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548140A (en) * 1967-07-25 1970-12-15 Continental Can Co Method and apparatus for sealing containers using heat activated magnetic sealing compound
JPS57148619A (en) * 1981-03-09 1982-09-14 Honshu Paper Co Ltd Method and apparatus for bonding of container or the like by high frequency induction heating
EP0842854A2 (en) * 1996-11-15 1998-05-20 Auto-Mate Technologies, LLC Induction sealing apparatus for sealing a foil cap to a container opening

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 253 (M - 178) 11 December 1982 (1982-12-11) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3083733A1 (en) 2018-07-16 2020-01-17 Arkema France Method of induction welding of parts based on thermoplastic material
FR3083734A1 (en) 2018-07-16 2020-01-17 Arkema France METHOD FOR INDUCTION WELDING OF PARTS BASED ON THERMOPLASTIC MATERIAL
FR3083732A1 (en) 2018-07-16 2020-01-17 Arkema France Method for welding parts based on thermoplastic material
WO2020016514A1 (en) 2018-07-16 2020-01-23 Arkema France Method for welding parts made of thermoplastic material
US11685125B2 (en) 2018-07-16 2023-06-27 Arkema France Method for welding parts made of thermoplastic material

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